<template>
    <div>
        <!-- 面包屑导航 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>数据统计</el-breadcrumb-item>
            <el-breadcrumb-item>数据报表</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片区域 -->
        <el-card>
            <!-- 2. 为ECharts准备一个具备大小（宽高）的Dom -->
            <div id="main" style="width: 700px;height:400px;"></div>
        </el-card>
    </div>
</template>

<script>
    // 1. 导入echarts
    import echarts from 'echarts'
    // 导入lodash
    import _ from 'lodash'

    export default {
        data() {
            return {
                // 需要合并的数据
                options: {
                    title: {
                        text: '用户来源'
                    },
                    tooltip: {
                        trigger: 'axis',
                        axisPointer: {
                            type: 'cross',
                            label: {
                                backgroundColor: '#E9EEF3'
                            }
                        }
                    },
                    grid: {
                        left: '3%',
                        right: '4%',
                        bottom: '3%',
                        containLabel: true
                    },
                    xAxis: [
                        {
                            boundaryGap: false
                        }
                    ],
                    yAxis: [
                        {
                            type: 'value'
                        }
                    ]
                }
            }
        },
        created() { },
        async mounted() {
            // 3. 基于准备好的dom，初始化echarts实例
            var myChart = echarts.init(document.getElementById('main'));

            // 发起请求获取报表数据
            const { data: res } = await this.$axios.get('reports/type/1');
            if (res.meta.status !== 200) return this.$message.error('获取报表失败!');

            // 4. 指定图表的配置项和数据
            // _.merge 合并数据
            const result = _.merge(res.data, this.options)

            // 5. 使用刚指定的配置项和数据显示图表。
            myChart.setOption(result);

        },
        methods: {}
    }
</script>

<style scoped>

</style>